Karina has experienced BP before, but this is the first time she has experimented by doing it to herself.
Totally enclosed in a pvc catsuit, Karina cuffs herself with a pair of heavy Clejuso handcuffs. A rubber gasmask, attached to the bubbler bottle, is added to the outfit and Karina starts playing with herself with a pink vibrator.
Watch as she decreases the amount of air available in each breath, culminating in deliberately cutting off her own air supply.